Managing LLDP

The IEEE 802.1AB defined standard, Link Layer Discovery Protocol (LLDP), allows stations residing on an 802 LAN to advertise major capabilities and physical descriptions. This information is viewed by a network manager to identify system topology and detect bad configurations on the LAN.

LLDP is a one-way protocol; there are no request/response sequences. Information is advertised by stations implementing the transmit function, and is received and processed by stations implementing the receive function. The transmit and receive functions can be enabled/disabled separately per port. By default, both transmit and receive are disabled on all ports. The application is responsible for starting each transmit and receive state machine appropriately, based on the configured status and operational state of the port.

TejNOS-EN allows LLDP to have multiple LLDP neighbors per interface. The number of such neighbors is limited by the memory constraints. A product-specific constant defines the maximum number of neighbors supported by the switch. There is no restriction on the number of neighbors supported on a per LLDP port. If all the remote entries on the switch are filled up, the new neighbors are ignored. In case of multiple VOIP devices on a single interface, the 802.1ab component sends the Voice VLAN configuration to all the VoIP devices.

Global Configuration

Use the LLDP Global Configuration page to specify LLDP parameters that are applied to the switch.

To display the LLDP Global Configuration page, click Switching > LLDP > Global Configuration in the navigation menu.

LLDP Global Configuration

LLDP Global Configuration Fields

Field	Description
Transmit Interval	Specifies the interval at which LLDP frames are transmitted. The default is 30 seconds, and the valid range is 1-32768 seconds.
Transmit Hold Multiplier	Specifies multiplier on the transmit interval to assign to TTL. The default is 4, and the range is 2-10.
Re-Initialization Delay	Specifies the delay before a re-initialization. The default is 2 seconds, and the range is 1-10 seconds.
Notification Interval	Limits the transmission of notifications. The default is 5 seconds, and the range is 5-3600 seconds.

If you make any changes to the page, click Submit to apply the new settings to the system.

Interface Configuration

Use the LLDP Interface Configuration page to specify LLDP parameters that are applied to a specific interface.

To display the LLDP Interface Configuration page, click Switching > LLDP > Interface Configuration in the navigation menu.

LLDP Interface Configuration

LLDP Interface Configuration Fields

Field	Description
Interface	Specifies the port to be affected by these parameters.
Transmit	Enables or disables the transmission of LLDP protocol data units (PDUs). The default is disabled.
Receive	Enables or disables the ability of the port to receive LLDP PDUs. The default is disabled.
Notify	When notifications are enabled, LLDP interacts with the Trap Manager to notify subscribers of remote data change statistics. The default is disabled.
Transmit Management Information	Select the check box to enable the transmission of management address instance. Clear the check box to disable management information transmission. The default is disabled.
Optional TLV(s)	Select each check box next to the type‐length value (TLV) information to transmit. Choices include: System Name. To include system name TLV in LLDP frames. System Description. To include system description TLV in LLDP frames. System Capabilities. To include system capability TLV in LLDP frames. Port Description. To include port description TLV in LLDP frames.

If you make any changes to the page, click Submit to apply the new settings to the system.

Interface Summary

Use the LLDP Interface Summary page to view the LLDP parameters configured on each physical port on the system.

To display the LLDP Interface Summary page, click Switching > LLDP > Interface Summary in the navigation menu.

LLDP Interface Summary

LLDP Interface Summary Fields

Field	Description
Interface	Displays all the ports on which LLDP‐802.1AB can be configured.
Link Status	Displays whether the link status of the ports is up or down.
Transmit	Displays the LLDP-802.1AB transmit mode of the interface.
Receive	Displays the LLDP-802.1AB receive mode of the interface.
Notify	Displays the LLDP-802.1AB notification mode of the interface.
Optional TLV(s)	Shows the LLDP‐802.1AB optional type‐length values (TLV) that are included. If no TVLs are sent, the entry is blank. The field can contain one or more of the following TVLs. System Name System Capabilities System Description Port Description
Transmit Management Information	Shows whether the management address is transmitted in the LLDP frames.

To update the page with the latest data, click Refresh.

Statistics

Use the LLDP Statistics page to view the global and interface LLDP statistics.

To display the LLDP Statistics page, click Switching > LLDP > Statistics in the navigation menu.

LLDP Statistics

LLDP Statistics Fields

Field	Description

System-wide Statistics
Last Update	Displays the time when an entry was created, modified, or deleted in the tables associated with the remote systems.
Total Inserts	Displays the number of times a complete set of information advertised by a particular MAC Service Access Point (MSAP) has been inserted into the tables associated with the remote systems.
Total Deletes	Displays the number of times a complete set of information advertised by a particular MAC Service Access Point (MSAP) has been deleted from the tables associated with the remote systems.
Total Drops	Displays the number of times a complete set of information advertised by a particular MAC Service Access Point (MSAP) could not be entered into tables associated with the remote systems because of insufficient resources.
Total Ageouts	Displays the number of times a complete set of information advertised by a particular MAC Service Access Point (MSAP) has been deleted from tables associated with the remote systems because the information timelines interval has expired.
Port Statistics
Interface	Identifies the interfaces.
Transmit Total	Displays the total number of LLDP frames transmitted by the LLDP agent on the corresponding port.
Receive Total	Displays the total number of valid LLDP frames received by the LLDP agent on the corresponding port, while the LLDP agent is enabled.
Discards	Displays the number of LLDP TLVs discarded for any reason by the LLDP agent on the corresponding port.
Errors	Displays the number of invalid LLDP frames received by the LLDP agent on the corresponding port, while the LLDP agent is enabled.
Ageouts	Displays the number of age-outs that occurred on a given port. An age-out is the number of times the complete set of information advertised by a particular MAC Service Access Point (MSAP) has been deleted from tables associated with remote entries because the information timeliness interval had expired.
TLV Discards	Displays the number of LLDP TLVs (Type, Length, Value sets) discarded for any reason by the LLDP agent on the corresponding port.
TLV Unknowns	Displays the number of LLDP TLVs received on the local ports which were not recognized by the LLDP agent on the corresponding port.
TLV MED	Displays the total number of LLDP-MED TLVs received on the local ports.
TLV 802.1	Displays the total number of LLDP TLVs received on the local ports which are of type 802.1.
TLV 802.3	Displays the total number of LLDP TLVs received on the local ports which are of type 802.3.

Click Refresh to update the page with the most current information.
Click Clear to clear the LLDP statistics of all the interfaces.

Local Device Information

Use the LLDP Local Device Information page to view the data that each port advertises through LLDP.

To display the LLDP Local Device Information page, click Switching > LLDP > Local Device Information in the navigation menu.

LLDP Local Device Information

LLDP Local Device Information Fields

Field	Description
Interface	Select from the list of all the ports on which LLDP-802.1AB frames can be transmitted.
Chassis ID Subtype	Displays the string that describes the source of the chassis identifier.
Chassis ID	Displays the string value used to identify the chassis component associated with the local system.
Port ID Subtype	Displays the string describing the source of the port identifier.
Port ID	Identifies the physical address of the port.
System Name	Displays the system name of the local system.
System Description	Displays the description of the selected port associated with the local system.
Port Description	Displays the user-defined description of the port.
System Capabilities Supported	Displays the system capabilities of the local system.
System Capabilities Enabled	Displays the system capabilities of the local system which are supported and enabled.
Management Address	Displays the advertised management address of the local system.
Management Address Type	Specifies the type of the management address.

Click Refresh to update the information on the screen with the most current data.

Local Device Summary

Use the LLDP Local Device Summary page to view information about all interfaces on the device that are enabled to transmit LLDP information.

To display the LLDP Local Device Summary page, click Switching > LLDP > Local Device Summary in the navigation menu.

LLDP Local Device Summary

LLDP Local Device Summary Columns

Field	Description
Interface	Displays the interface on which LLDP-802.1AB frames can be transmitted.
Port ID	Displays the string describing the source of the port identifier.
Port Description	Displays the description of the port associated with the local system.

Click Refresh to update the information on the screen with the most current data.

Remote Device Information

Use the LLDP Remote Device Information page to view the data that a specified interface has received from other LLDP-enabled systems.

To display the LLDP Remote Device Information page, click Switching > LLDP > Remote Device Information in the navigation menu.

LLDP Remote Device Information

LLDP Remote Device Information Fields

Field	Description

Local Interface	Select the interface on the local system to display the LLDP information it has received.
NOTE: If no LLDP data has been received on the select interface, a message stating so displays. If the selected interface has received LLDP information from a remote device, the following fields are displayed.
Remote ID	Displays the remote client identifier assigned to the remote system.
Chassis ID Subtype	Identifies the type of data displayed in the Chassis ID field on the remote system.
Chassis ID	Identifies the chassis component associated with the remote system.
Port ID Subtype	Identifies the type of data displayed in the remote system’s Port ID field.
Port ID	Identifies the physical address of the port on the remote system from which the data was sent.
System Name	Identifies the system name of the remote system.
System Description	Displays the description of the selected port associated with the remote system.
Port Description	Displays the user-defined description of the port.
System Capabilities Supported	Displays the system capabilities of the remote system.
System Capabilities Enabled	Displays the system capabilities of the remote system which are supported and enabled.
Time to Live	Displays the Time to Live value in seconds of the received remote entry.
Management Address	Displays the advertised management address of the remote system.
Management Address Type	Displays the type of the management address.

Click Refresh to update the information on the screen with the most current data.

Remote Device Summary

Use the LLDP Remote Device Summary page to view information about all interfaces on the device that are enabled to transmit LLDP information.

To display the LLDP Remote Device Summary page, click Switching > LLDP > Remote Device Summary in the navigation menu.

LLDP Remote Device Summary

LLDP Remote Device Summary Columns

Field	Description
Local Interface	Shows the interface on the local system that can receive LLDP frames advertised by a remote system.
Chassis ID	Identifies the chassis component associated with the remote system.
Port ID	Identifies the physical address of the port on the remote device that sent the LLDP data.
Remote ID	Shows the remote client identifier assigned to the remote system.
System Name	Shows the system name of the remote device. If the system name is not configured, the field is blank.

Click Refresh to update the information on the screen with the most current data.

LLDP-MED

The Link Layer Discovery Protocol-Media Endpoint Discovery (LLDP-MED) is an enhancement to LLDP that features:

Auto-discovery of LAN policies (such as VLAN, Layer 2 Priority and DiffServ settings), enabling plug and play networking.
Device location discovery for creation of location databases.
Extended and automated power management of Power over Ethernet endpoints.
Inventory management, enabling network administrators to track their network devices and determine their characteristics (manufacturer, software and hardware versions, serial/asset number).

LLDP-MED Global Configuration

Use this page to set global parameters for LLDP-MED operation. To display this page, click Switching > LLDP > LLDP-MED > Global Configuration in the navigation menu.

LLDP Global Configuration

LLDP Global Configuration Fields

Field	Description
Fast Start Repeat Count	Specifies the number of LLDP PDUs that will be transmitted when the protocol is enabled. The range is from (1 to 10). The default value is 3.
Device Class	Specifies local device's MED Classification. The following three represent the actual endpoints: Class I Generic [IP Communication Controller etc.] Class II Media [Conference Bridge etc.] Class III Communication [IP Telephone etc.] The fourth device is Network Connectivity Device, which is typically a LAN switch/ router, IEEE 802.1 bridge, IEEE 802.11 wireless access point, etc.

Field

Description

Fast Start Repeat Count

Specifies the number of LLDP PDUs that will be transmitted when the protocol is enabled. The range is from (1 to 10). The default value is 3.

Device Class

Specifies local device's MED Classification. The following three represent the actual endpoints:

Class I Generic [IP Communication Controller etc.]
Class II Media [Conference Bridge etc.]
Class III Communication [IP Telephone etc.]

The fourth device is Network Connectivity Device, which is typically a LAN switch/ router, IEEE 802.1 bridge, IEEE 802.11 wireless access point, etc.

Click Submit to updated the switch. The changes take effect but will not be retained across a power cycle unless a save is performed.

LLDP-MED Interface Configuration

Use this page to enable LLDP-MED mode on an interface and configure its properties. To display this page, click Switching > LLDP > LLDP-MED > Interface Configuration in the navigation menu.

LLDP-MED Interface Configure

LLDP-MED Interface Configuration Fields

Field	Description
Interface	Selects the port that you want to configure LLDP-MED - 802.1AB on. You can select All to configure all interfaces on the DUT with the same properties. The Interface Configuration page will not be able to display the summary of ‘All’ interfaces. The summary of individual interfaces is visible from the Interface Configuration page. The Interface Configuration page for the ‘All’ option will always display the LLDP-MED mode and notification mode as ‘disabled’ and checkboxes for ‘Transmit TLVs’ will always be unchecked.
LLDP-MED Mode	Enables or disables LLDP-MED mode for the selected interface. By enabling MED, you will be effectively enabling the transmit and receive function of LLDP.
Config Notification Mode	Enables or disables LLDP-MED topology change notification mode for the selected interface.
Transmit TLVs	Specifies which optional type length values (TLVs) in the LLDP‐MED will be transmitted in the LLDP PDUs frames for the selected interface: MED Capabilities: Transmits the capabilities TLV in LLDP frames. Network Policy: Transmits the network policy TLV in LLDP frames. Location Identification: Transmits the location TLV in LLDP frames. Extended Power via MDI - PSE: Transmits the extended PSE TLV in LLDP frames. Extended Power through MDI - PD: Transmits the extended PD TLV in LLDP frames. Inventory: Transmits the inventory TLV in LLDP frames.

Click Submit to send the updated configuration to the switch. These changes take effect immediately but will not be retained across a power cycle unless a save is performed.

LLDP-MED Interface Summary

This page lists each switch interface and its LLDP configuration status. To display this page, click Switching > LLDP > LLDP-MED > Interface Summary in the navigation menu.

LLDP-MED Interface Summary

LLDP-MED Interface Summary Fields

Field	Description
Interface	Specifies all the ports on which LLDP-MED can be configured.
Link Status	Specifies the link status of the ports as Up/Down.
MED Status	MED Status Specifies the transmit and/or receive LLDP-MED mode is enabled or disabled on this interface.
Operational Status	Specifies whether the interface will transmit TLVs.
Notification Status	Specifies the LLDP-MED topology notification mode of the interface.
Transmit TLVs	Specifies the LLDP-MED transmit TLV(s) that are included.

Click Refresh to update the page with the latest information from the router.

LLDP Local Device Information

This page displays information on LLPD-MED information advertised on the selected local interface. To display this page, click Switching > LLDP > LLDP-MED > Local Device Information in the navigation menu.

LLPD-MED Local Device Information

LLPD‐MED Local Device Information Fields

Field	Description
Interface	Select from the list of all the ports on which LLDP-MED frames can be transmitted.
Network Policy Information	Specifies if network policy TLV is present in the LLDP frames: Media Application Type: Specifies the application type. Types of application types are unknown, voicesignaling, guestvoice, guestvoicesignalling, softphonevoice, videoconferencing, streammingvideo, vidoesignalling. Each application type that is received has the VLAN ID, priority, DSCP, tagged bit status and unknown bit status. A port may receive one or many such application types. This information is only displayed when a network policy TLV has been transmitted. Vlan Id: Specifies the VLAN id associated with a particular policy type. Priority: Specifies the priority associated with a particular policy type. DSCP: Specifies the DSCP associated with a particular policy type. Unknown Bit Status: Specifies the unknown bit associated with a particular policy type. Tagged Bit Status: Specifies the tagged bit associated with a particular policy type.
Inventory	Specifies the inventory TLV present in LLDP frames: Hardware Revisions. Specifies hardware version. Firmware Revisions. Specifies firmware version. Software Revisions. Specifies software version. Serial Number. Specifies serial number. Manufacturer Name. Specifies manufacturer’s name. Model Name. Specifies model name. Asset ID. Specifies asset ID.
Location Information	Specifies if location TLV is present in LLDP frames: Sub Type: Specifies type of location information. Location Information: Specifies the location information as a string forgiven type of location ID.
Extended PoE	Specifies if local device is a PoE device. Device Type - Specifies power device type.
Extended PoE PSE	Specifies if extended PSE TLV is present in LLDP frame: Available: Specifies available power sourcing equipment's power value in tenths of watts on the port of local device. Source: Specifies power source of this port. Priority: Specifies PSE port power priority.
Extended PoE PD	Specifies if extended PD TLV is present in LLDP frame. Required: Specifies required power device power value in tenths of watts on the port of local device. Source: Specifies power source of this port. Priority: Specifies PD port power priority.

Click Refresh to update the page with the latest information from the router.

LLDP-MED Remote Device Information

This page displays information on LLPD-MED information received from remote clients on the selected local interface. To display this page, click Switching > LLDP > LLDP-MED > Remote Device Information in the navigation menu.

LLDP Remote Device Information-1

LLPD‐MED Local Device Information Fields

Field	Description
Local Interface	Specifies the list of all the ports on which LLDP-MED is enabled.
Remote ID	Specifies the remote client identifier assigned to the remote system.
Capability Information	Specifies the supported and enabled capabilities that were received in MED TLV on this port: Supported Capabilities: Specifies supported capabilities that were received in MED TLV on this port. Enabled Capabilities: Specifies enabled capabilities that were received in MED TLV on this port. Device Class: Specifies device class as advertised by the device remotely connected to the port.
Network Policy Information	Specifies if network policy TLV is received in the LLDP frames on this port: Media Application Type: Specifies the application type. Types of application types are unknown, voicesignaling, guestvoice, guestvoicesignalling, softphonevoice, videoconferencing, streammingvideo, vidoesignalling. Each application type that is received has the VLAN ID, priority, DSCP, tagged bit status and unknown bit status. A port may receive one or many such application types. This information is displayed only when a network policy TLV has been received on this port. Vlan ID: Specifies the VLAN ID associated with a particular policy type. Priority: Specifies the priority associated with a particular policy type. DSCP: Specifies the DSCP associated with a particular policy type. Unknown Bit Status: Specifies the unknown bit associated with a particular policy type. Tagged Bit Status: Specifies the tagged bit associated with a particular policy type.
Inventory	Specifies the inventory TLV is received in LLDP frames on this port: Hardware Revisions. Specifies hardware version of the remote device. Firmware Revisions. Specifies firmware version of the remote device. Software Revisions. Specifies software version of the remote device. Serial Number. Specifies serial number of the remote device. Manufacturer Name. Specifies manufacturer’s name of the remote device. Model Name. Specifies model name of the remote device. Asset ID. Specifies asset ID of the remote device.
Location Information	Specifies if location TLV is received in LLDP frames on this port. Sub Type: Specifies type of location information. Location Information: Specifies the location information as a string for given type of location ID.
Extended PoE	Specifies if remote device is a PoE device. Device Type. Specifies the remote device’s PoE device type connected to this port.
Extended PoE PSE	Specifies if extended PSE TLV is received in LLDP frame on this port: Available: Specifies the remote port’s power sourcing equipment's (PSE) power value in tenths of watts. Source: Specifies the remote port’s PSE power source. Priority: Specifies the remote port’s PSE power priority.
Extended PoE PD	Specifies if extended PD TLV is received in LLDP frame on this port. Required: Specifies the remote port’s power device power requirement. Source: Specifies the remote port’s PD power source. Priority: Specifies the remote port’s PD power priority.

Click Refresh to update the page with the latest information from the router.